#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <unistd.h>
#include <time.h>

int usleep(unsigned useconds)
{
    struct timespec tv = {
        .tv_sec = useconds/1000000,
        .tv_nsec = (useconds%1000000)*1000
    };
    return nanosleep(&tv, &tv);
}
